Itärastit Siikajärvi
Really nice runnable terrain! Maybe +12 C or so. Felt a bit unsure after #5 when the bigger path towards #6 didn't appear soon enough. Big mistake on #10 where just before the control I searched left instead of right..
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Itärastit Haapapuro
A bit difficult terrain until #2, but then really nice until #9 or so when my fitness ran out..
Itärastit Svedängen
Mistakes at the start into #2 (passed really close on the first try) and direction into #3 (should have found the dashed stream?). Otherwise quite easy running along roads and paths. Sunny and +15 C or so.
120 MHz FGA01FC/OPA818 photodetector with 12 kOhm RF
PCB: One Inch Photodetector Transimpedance model: TIASim Previous similar designs: 200 MHz photodetector (RF 4k7) 400 MHz photodetector (RF 1k2)
Firmaliiga 2021/6 Velskola
Easier course than the last two weeks - mostly running along paths. +15C or so.
New SMA-to-SFP breakout boards
I made a new batch of the SFP Breakout Board. With a 1 Gbit/s SFP transciever the bandwidth when transmitting from the TX port of one board to the RX port of another board seems to be almost 1.8 GHz.
Firmaliiga 2021/5 Kattilajärvi
Rainy and wet but quite warm. First a loop looking for #6 too soon, and then along the wrong hill towards #7..
Firmaliiga 2021/4 Haukkalampi
Start of the Firmaliiga fall season at Haukkalampi. Maybe +20 C and quite humid. Lots of running along tracks/paths and then up/down a steep stony hill to fetch the control. Confused about the many paths inside the 1-2-3 triangle, then looked to early and too high for #6. Otherwise okish.
Husdata datalogger for heat-pump
I got this husdata datalogger for my heat-pump. It plugs in to a 3.5mm audio-connector inside the electronics box of the pump. On an IVT geo 312C pump it's fairly easy to install by removing the big front cover, then a smaller black cover, and then opening the electronics-box. I routed the wire into the … Continue reading Husdata datalogger for heat-pump
Partial solar eclipse 2021-06-10
Not-so-great phone camera picture through a small telescope of the partial solar eclipse on 2021-06-10 from Espoo, Finland. See also: partial eclipse on 2015-03-20 partial eclipse on 2008-08-01